Grain-screen



G. B. BAILEY.

Grain Screen.

No. 42,635. Patented May 10, 1864.

Inventon Witnesses: I z'wwi am/fizz Firms. HvoIo-Uihomphcr. Wnhingtmx. nc,

. IT D STATES;

PATENT OFFICE.

, G. B. BAILEY, OF GREENFIELD, INDIANA.

GRAIN-SCREEN.

Specification forming part of Letters Patent No. 42,635, dated May 10,1864.

.To all whom it may concern:

Be it known that I, G. B. BAILEY, of Greenfield, in the county ofHancock and State of Indiana, have invented a new and ImprovedGrain-Screen; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theaccompanying drawings, making a part of this specification, in whichFigure 1 is a vertical longitudinal section of my invention, taken inthe line mm, Fig. 2 Fig. 2, a transverse vertical section of the same,taken in the line y y, Fig. 1.

Similar letters of reference indicate corresponding parts in the twofigures.

This invention consists inthe employment or use of a rotating screen inconnection with a suction-fan and a valve, all constructed and arrangedin such a manner that the grain will be deprived of all impurities, andthe screen rendered capable of being supplied with grain with thegreatest facility, and the latter, when properly screened and cleansed,allowed to be very readily discharged from the screen.

To enable those skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A represents a framing of rectangular form, and constructed in anyproper manner to support the rotary screen B, which is composed of apolygonal frame having wire or other screens b inserted in everyalternate side, or in more of the sides, if desired. Within this rotaryscreen there are attached longitudinally a series of strips, 0, to catchthe grain and carry it up as the screen rotates, so as to insure aproper agitation of the grain. (See Fig. 2.)

In one end of the frame of the screen there is inserted at right angleswith its shaft 0 a disk, D, provided with one or more openings, (1,(four are shown in Fig. 2,) said openings being of conical form, largerin diameter at their inner than at their outer orifices, as shownclearly in Fig. 1.

E is a fan-case, which is secured to the end of the screen where thedisk D is placed, and F isa fan, the blades 6 of which are bent orcurved in spiral form, and are attached to a collar, f, placed looselyon the screen-shaft O.

The collar f has a pulley, G, upon it,around which and a pulley, H, on ashaft, 1, a cross belt or cord, 9, passes. The shaft I is in the lowerpart of the framing A, and receives its motion by means of a belt orcord, h, which passes around a pulley, J, at the closed end of thescreen,which is opposite to that where i the fan F is placed, and arounda pulley, t, on the shaft I. The fan F, in consequence of the belt orcord 9 being crossed, rotates in a reverse direction to the screen B, asindicated by the arrows in Fig. 2.

In one side of the screen B there is placed a valve, K, which extendsnearly the whole length of the screen, and is secured to thescreen-frame by hinges w and opens inward. This valve has a metal plate,j, attached to its inner end and curved inward, as shown in Fig. 2. v

L represents a case of polygonal form,wl1ich encompasses the screen Band has an opening or space, 70, at its lower end. One side, 1, of thecase L, adjoining the space it, is hung on pivots m, and this side I israther wider than any of the others, so that its lower part may form achute for the escape of the screenings, when said side 1 has its upperend secured in contact with the side Z immediately above it, as shown intint in Fig. 2.

The side on of the case L, above the side I, is movable in consequenceof being fitted in grooves n in the sides of the framing A. This side mis formed of two parts connected by hinges 0, and when the screen B isto be filled with grain the side m is drawn out from the grooves n andinserted in grooves 19, and said side is then converted into a chute orfeedboard to feed the grain into the screen through the valve K, thelatter,when at the upper part of the screen, opening by virtue of itsown gravity. When the screen is supplied with a requisite quantity ofgrain, the side mis placed in its proper position to form a part of thecase L, and the side lis also placed as shown in tint in Fig. 2, and arotary motion imparted to the screen B by any convenient power. The fanFdraws out from the grain in the screen smut, chaff, dirt, and all lightimpurities. The screenings pass off from the lower end of the side I.The valve K, when passing below the shaft of the screen, remains closedby its own gravity, so that the grain cannot escape through it, and whenthe grain is perfectly cleansed the screen is turned backward, so as tobring the valve K at the bottom, and said valve will be open inconsequence of the action of the grain against the curved plate j,

and the side 1 being previously turned down, as shown in red outline inFig. 2, the cleansed grain is conducted thereby into any properreceptacle.

Having thus described my invention. what I claim as new, and desire tosecure by Letters Patent, is-

1. The rotary screen 13, in combination with the fan F and disk B,providel with one or more openings, all arranged to operatesubstantially as and for the purpose herein set forth.

2. The valve K, fitted in one of the sides of the screen B, providedwith a curved plate, j, substantially as and for the purpose specified.

G. B. BAILEY. Witnesses:

H. B. THAYER, E. I. J UDKINs.

